EP 3973188 A4 20230607 - SPOOL VALVE USED IN A VARIABLE VANE PUMP
Title (en)
SPOOL VALVE USED IN A VARIABLE VANE PUMP
Title (de)
SPULENVENTIL FÜR EINE REGELBARE FLÜGELZELLENPUMPE
Title (fr)
DISTRIBUTEUR À TIROIR UTILISÉ DANS UNE POMPE À PALETTES VARIABLE
Publication
Application
Priority
- US 201962850074 P 20190520
- IB 2020054733 W 20200519
Abstract (en)
[origin: US2020370551A1] A variable displacement vane pump is described. The pump includes a control chamber provided between a housing and a control slide. A pressure-controlled relief valve is in fluid communication with the outlet path and moves to block or unblock a relief port based on output pressure of the lubricant. A feedback channel fluidly connects the control chamber to an inlet path of the pump. The feedback channel further connects to a control port that is connected to a main control valve. The relief valve and control valve are distinct and not fluidly connected. The relief valve moves once the pressure in the outlet path exceeds a predetermined amount, opening the relief port, and thus delivers a portion of the output lubricant to the control chamber via the relief port, thereby pressurizing the control chamber and reducing eccentricity of the pump by displacing the control slide.
IPC 8 full level
F04C 14/24 (2006.01); F01M 1/02 (2006.01); F01M 1/16 (2006.01); F04C 2/344 (2006.01); F04C 14/22 (2006.01)
CPC (source: CN EP KR US)
F01M 1/16 (2013.01 - EP KR US); F04C 2/344 (2013.01 - EP KR US); F04C 2/3445 (2013.01 - CN); F04C 14/226 (2013.01 - EP KR US); F04C 14/24 (2013.01 - EP KR); F04C 15/0092 (2013.01 - CN); F04C 15/06 (2013.01 - CN); F16K 17/04 (2013.01 - KR); F01M 2001/0238 (2013.01 - EP)
Citation (search report)
- [A] US 2016186623 A1 20160630 - VALKENBERG RALPH [DE]
- See references of WO 2020234765A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 11493036 B2 20221108; US 2020370551 A1 20201126; CA 3140286 A1 20201126; CN 111963421 A 20201120; CN 213116685 U 20210504; EP 3973188 A1 20220330; EP 3973188 A4 20230607; JP 2022533946 A 20220727; KR 20220010769 A 20220126; MX 2021014215 A 20220106; WO 2020234765 A1 20201126
DOCDB simple family (application)
US 202016877693 A 20200519; CA 3140286 A 20200519; CN 202010431217 A 20200520; CN 202020856707 U 20200520; EP 20809438 A 20200519; IB 2020054733 W 20200519; JP 2021568035 A 20200519; KR 20217041389 A 20200519; MX 2021014215 A 20200519